Is it implantation?

According to glow AF supposed to start 2 days ago but never came until now... I have heard that implantation is really rare, beside spotting.. I just don't want get my hopes up agian and cry a river of tears agian. But that dosent mean will stop trying S/O and I have been ttc for 5 years. But is this finally our rainbows baby, sould I waited a little bit more days and then tested and see if AF scheduled do come. it couldn't probably be stress.. that is like this to thank you ladies for taking time to read this.